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Table 4 Difference in constant systematic error in reporting of fruit and vegetable intake between baseline and each follow-up visit

From: Differential reporting of fruit and vegetable intake among youth in a randomized controlled trial of a behavioral nutrition intervention

Visit timeline Intervention Control
βa p βa p
Baseline, 6 months follow-up 0.03 0.73 −0.02 0.83
Baseline, 12 months follow-up −0.03 0.68 0.04 0.65
Baseline, 18 months follow-up −0.06 0.50 −0.001 0.99
  1. aEstimated by regressing visit timeline and fruit and vegetable intake on serum carotenoids, where the slope of visit timeline indicates difference in constant systematic error between baseline and follow-up visit